AC Power Consumption Calculator
& Unit Estimator
Find out exactly how many units (kWh) your AC consumes daily, monthly, and yearly — and see the real rupee cost of your current setup vs. a 5-star upgrade.
Rated 4.8 out of 5 by 2,340+ users — India's most trusted AC bill calculator
A 1.5 ton 5-star inverter AC consumes 1.05 kW per hour — equivalent to running 10 LED bulbs simultaneously. At 8 hours per day, this is 8.4 kWh daily, 252 kWh monthly, costing ₹1,764 at ₹7/unit. A 3-star model consumes 1.55 kW/hr — 48% more for the same cooling output.
Also useful: Compare how much YOU save by upgrading your specific AC
Now that you know how many units your AC consumes, find out exactly how much you save annually by switching to a 5-star inverter model — and when the upgrade pays for itself.
Open AC Savings Calculator — see your personal payback period8+ years practical experience in AC / Plant Installation, Maintenance and Repair. HVAC Expert at S.R Enterprise under the authorized dealership of Hitachi. All data is verified against 2026 BEE Tariff Orders and manufacturer specifications.
Affiliate Disclosure: This page contains affiliate links. As an Amazon Associate, The DU Tech Team earns from qualifying purchases. This does not affect our recommendations. Read our full disclosure →
AC Type
BEE Star Rating
Power draw at 1.5 Ton: 1.4 kW/hr
Efficiency Score
Decent efficiency. A 5-star inverter upgrade would cut this bill by 30–40%.
Energy Summary
Daily Units
11.20 kWh
₹89.60/day
Monthly Units
336.0 kWh
₹2688/month
Yearly Units
4088 kWh
₹32704/year
5-Year Cost Projection
₹1,63,520
over 5 years
Upgrade Savings Potential
Switching to a 5-Star Inverter Split would cost:
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LG 1.5T 5★ Dual Inverter
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* Affiliate links — we may earn a small commission at no extra cost to you.
AC Power Consumption India 2026 — All Tonnages
Reference table for daily, monthly, and annual unit consumption across common tonnages and star ratings. Based on BEE 2026 ISEER certified data.
| Tonnage | Star Rating | kW per hour | Units/day (8h) | Units/month | kWh/year (1,600h) |
|---|---|---|---|---|---|
| 1.0T | 3★ | 1.08 kW | 8.6 | 259 | 1,728 |
| 1.0T | 5★ | 0.75 kW | 6.0 | 180 | 1,200 |
| 1.5T | 3★ | 1.55 kW | 12.4 | 372 | 2,480 |
| 1.5T | 5★ | 1.05 kW | 8.4 | 252 | 1,680 |
| 1.5T | Top (ISEER 5.8) | 0.73 kW | 5.8 | 175 | 1,168 |
| 2.0T | 3★ | 2.20 kW | 17.6 | 528 | 3,520 |
| 2.0T | 5★ | 1.50 kW | 12.0 | 360 | 2,400 |
BEE ISEER is measured at standardised conditions. Real-world consumption is 15–25% higher on peak summer days (40°C+ ambient) and 10–20% lower during mild weather.
How Ambient Temperature Affects AC Power Draw
Your AC does not consume the same power every day. Outdoor temperature directly impacts compressor load and wattage.
Mild weather — AC runs efficiently
Standard lab test conditions
Most Indian cities in May–June
Rajasthan, Gujarat, Delhi NCR
This is why your June bill is 30–40% higher than your April bill even with the same hours — the outdoor temperature forces the AC to work harder. At 45°C, a 1.5T 5-star inverter AC that normally draws 1.05 kW will pull approximately 1.35–1.47 kW, adding ₹15–₹20 per day to your electricity cost.
How Many Units Does a 1.5 Ton AC
Consume Per Hour?
Power consumption (kWh) at 1.5 Ton across all star ratings and AC types. Based on BEE 2026 certified data at ₹8/unit.
1★ Fixed
2.1 kW
2★ Fixed
1.9 kW
3★ Fixed
1.65 kW
3★ Inv.
1.4 kW
4★ Inv.
1.15 kW
5★ Inv.
0.92 kW
1★ Fixed Speed
₹12,096
1,512 units/month · 8 hrs/day · ₹8/unit
3★ Inverter
₹8,064
1,008 units/month · 8 hrs/day · ₹8/unit
5★ Inverter
₹5,299
662 units/month · 8 hrs/day · ₹8/unit
Inverter vs. Non-Inverter
Power Consumption Facts
The technology difference is massive. Here's the data that AC salespeople don't always tell you.
35%
Power Draw Difference
A 5-star inverter uses 35% less electricity than a 3-star fixed-speed at the same tonnage.
₹38,000+
5-Year Savings
Switching from a 3-star fixed to a 5-star inverter saves over ₹38,000 in electricity over 5 years (8 hrs/day, ₹8/unit).
2–3×
Inverter Compressor Lifespan
Inverter compressors last 2–3x longer because they never fully stop and restart — eliminating the high-stress startup surge.
±20%
Voltage Fluctuation Tolerance
Modern inverter ACs handle ±20% voltage fluctuation — critical for Indian grid conditions in tier-2 and tier-3 cities.
Ready to find the most efficient model?
Our experts have ranked the best 5-star inverter ACs available in India right now.
Electricity Slab Rates Across Major Indian Cities
AC usage typically pushes households into higher slabs. Use the correct rate in the calculator above for accurate results.
* Rates are approximate and subject to change. Check your local DISCOM for the latest tariff schedule. Rates per kWh (unit).
Frequently Asked Questions
Exact answers to the most searched AC power consumption questions in India.
How many units does 1.5 ton AC consume per hour?
A 1.5 ton 5-star inverter AC consumes 1.05 units (kWh) per hour under BEE standard conditions. A 3-star 1.5T model consumes 1.55 units/hr. The exact figure varies with outdoor temperature: expect 1.2–1.4 units/hr on a 42°C day.
How many units does AC consume in a day?
For 8 hours of operation: a 1.5T 5-star uses 8.4 units/day (1.05 kW × 8 hrs). A 1.5T 3-star uses 12.4 units/day. For 10 hours: 10.5 units (5★) or 15.5 units (3★). Monthly: multiply by 30 days.
How much electricity does AC use in one hour in India?
At BEE 2026 standard conditions (35°C): 1T 5★ uses 0.75 units, 1.5T 5★ uses 1.05 units, 2T 5★ uses 1.50 units per hour. At ₹7/unit, this is ₹5.25, ₹7.35, and ₹10.50 per hour respectively.
How many units does 1 ton AC consume per month?
A 1 ton 5-star inverter AC running 8 hours daily consumes approximately 180 units per month (0.75 kW × 8 hrs × 30 days). A 1 ton 3-star uses approximately 259 units/month. At ₹7/unit: ₹1,260/month (5★) vs ₹1,813/month (3★).
Why is my electricity bill higher in June than April with the same AC usage?
Because your AC works 30–40% harder in June. At 45°C outdoor temperature, your AC draws 130–140% of its rated wattage versus 85% at 30°C. A 1.5T 5-star AC that uses 8.4 units/day in April will use 11–12 units/day in peak June heat, adding ₹600–₹900 to your monthly bill.
Know your consumption? Now find the most efficient AC.
Commercial spaces have higher heat loads. Use our AC Tonnage Calculator with 'High Occupancy' settings.
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The lowest-consumption ACs in India — ranked by ISEER and real-world efficiency.
Calculate Your Savings
See exactly how much you save annually by switching to a 5-star inverter model.
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Inverter ACs use 40–60% less power than fixed-speed models. See the top picks.
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